Chapter 5

But is it only in that which moves itself in place that there must be a point at rest, or does this hold also of that which causes its own qualitative¹ changes, and its own growth? Now the question of original generation and decay is different; for if there is, as we hold, a primary movement, this would be the cause of generation and decay, and probably of all the secondary movements too. And as in the universe, so in the animal world this is the primary movement, when the creature attains² maturity³; and therefore it is the cause of growth, when the creature becomes the cause of its own growth, and the cause too of alteration⁴. But if this is not the primary movement then the point at rest is not necessary. However, the earliest growth and alteration in the living creature arise through another and by other channels, nor can anything possibly be the cause of its own generation and decay, for the mover must exist before the moved, the begetter⁵ before the begotten⁶, and nothing is prior to itself.

1 qualitative   

adj.性质上的，质的，定性的

参考例句：

• There are qualitative differences in the way children and adults think.孩子和成年人的思维方式有质的不同。
• Arms races have a quantitative and a qualitative aspects.军备竞赛具有数量和质量两个方面。

2 attains   

（通常经过努力）实现( attain的第三人称单数 )； 达到； 获得； 达到（某年龄、水平、状况）

参考例句：

• This is the period at which the body attains maturity. 这是身体发育成熟的时期。
• The temperature a star attains is determined by its mass. 恒星所达到的温度取决于它的质量。

3 maturity   

n.成熟；完成；(支票、债券等)到期

参考例句：

• These plants ought to reach maturity after five years.这些植物五年后就该长成了。
• This is the period at which the body attains maturity.这是身体发育成熟的时期。

4 alteration   

n.变更，改变；蚀变

参考例句：

• The shirt needs alteration.这件衬衣需要改一改。
• He easily perceived there was an alteration in my countenance.他立刻看出我的脸色和往常有些不同。

5 begetter   

n.生产者，父

参考例句：

• Elvis Presley was the true begetter of modern youth culture. 埃尔维斯·普雷斯利是现代青年文化的真正奠基人。 来自柯林斯例句

6 begotten   

v.为…之生父( beget的过去分词 )；产生，引起

参考例句：

• The fact that he had begotten a child made him vain. 想起自己也生过孩子，他得意了。 来自辞典例句
• In due course she bore the son begotten on her by Thyestes. 过了一定的时候，她生下了堤厄斯式斯使她怀上的儿子。 来自辞典例句